Hammer rod for crushers



Dec. 26, 1922. W. M. DAVIDSON.

HAMMER ROD FOR CRUSHERS.

FILED JULY 28.1922.

shunts! Patented Dec. 26, 1922..

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WILLIAM M. DAVIDSON, OF ST. LOUIS, MISSOURI, ASSIGNOR TO \VILLIAFIS PATENT oausnna & PULvEaIzEa COMPANY, OF s r. 'Lo is, mrssounr, A CORPORATION or MISSOURI.

/ HAMMER ROD FOR CRUSHERS.

Application filed July 28,

To all whom it may concern Be it known that I, VVILLIAM M. DAVID? SON, a citizen of the United States, residing at St. Louis, State of Missouri, have invented cer'tain new and useful Improvements in I-Iammer Rods for Crushers, of which the following is a specification.

This invention relates to certain new and useful improvements in hammer rods for crushers, the oeculiarities of which will be fully describe and claimed hereinafter.

The main object of my invention is to provide a flexible hammer rod for rotary pivoted hammers in crusher-s and like machines, that will allow of bending the rod out of its normal axis as mounted in the crusher with the hammers thereon, so that the rod will clear the ball bearings when inserting and withdrawing the rod and and without separating the sections of the rod.

In the accompanying drawing on which like reference numerals indicate corresponding parts, Fig. 1, represents a vertical central sectional elevation of a crusher exemplifying my invention; Fig. 2, an enlarged detail of the rod alone in the preferred form; Fig. 3, a similar view showing the rod bent at its pivot connections; and Fig. 4, a cross section of the rod on the line 2-2 of Fig. 2.

The numeral 3 designates the cover casing and 4 the body casing of a crusher or like machine provided with ball bearings 5 carrying a rotor shaft 6 on which is mounted hammer rod supports 7 in a series as shown in Fig. 1, and provided with holes alined and eccentric to the shaft, in which holes are mounted hammer rods 8 carrying rotary pivoted hammers 9. The holes in the rod supports are located a lesser distance from the axis of the shaft than the outer portions of the bearings which are at such. distance from the side casing that a continuous rod. cannot be inserted or withdrawn from the alined holes in the discs, unless one of the hearings is removed from its bracket on the body casing.

In my construction I provide a flexible hammer rod formed in sections connected together, preferably by means of overlapping portions of the meeting ends of the sections formed by a tongue 10 on one section fitting into a recess 11 on the adjacent section formed by the sides 12 overlapping 1922. Serial No. 578,176.

the tongue 10 and connected through the axis X of the rod and thus allow of draw- I ing out the rod from the rod supports and bending up the sections successively to clear the bearing 5 as indicated by dotted lines in Fig. 1. When the cover is raised the distance from the rotor to the bearing is more than the length of the sections into which the rods are divided, so that when the rod is'drawn out the first section will be clear of the rotor before the end of the rod interferes with the bearing. Thev section can then be bent upward and the'second section pulled outward, and so on successively. It is understood that the nut 14: or other fastening at the end of the rod, is removed before the opposite end of the rod is pulled outward as indicated.

The cover casing as usual is raised to expose the rotor when changing the hannners as above described.

The sections of "the rods are always con- I nected and act like a straight hammer rod when mounted in the holes of the rod supports. It is only when withdrawn as above described, that the rods became flexible about their pivotal connections of the sections with each other.

I claim: I

1. In a rotary beater mill the combination of a rotatable shaft, hammer supports mounted on said shaft and having openings therein, flexible sectional rods sup-.

ported in said openings, and. hammers mounted on said rods.

2. In a crusher, a hammer rod in sections pivotally connected,--the meeting ends of said sections having overlapping matching tongue and recess portions respectively and the ends of the tongue and recess being formed by surfaces lying in transverse planes slantingly inclined to the axis of the rod, substantially as and for the purpose described.

3. A crusher comprising a casing, a rotor shaft having outside bearings, a series of hammer rod supports on said shaft having alined holes eccentric to the shaft and located at a lesser radial distance than said bearings extend from the axis of the shaft,

rotary pivoted hammers, and flexible hammer rods consisting of sections mounted in said alined holes and carrying said ham- 'Iners,the said sections of the rods being less in length than the distance from the rotor to the bearingiand capable of bending 10 outward from the axis of the alined holes so as to be inserted and Withdrawn from the rod supports Without interfering With said bearing.

In testimony whereof I have aifixed my 15 signature.

WILLIAM M. DAVIDSON. 

